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the percentiles are computed in the following way: All values which are collected withing one hour (e.g. 8-9, 9-10, ...) are used for computation of percentiles for this particular hour and the timestamp is artificially set to the beginning of this interval (e.g. 8:00,9:00) . If you want to report a timeframe less than one hour it is necessary to cover these timestamps in the report to see percentiles in your report. Maybe it is sufficient to expand the report interval to cover the whole hour?

Is there a suggestion for graphing a custom percentile over time? For example, an SLA that says 98% of transactions need to be less than x seconds. I can change my Series aggregation to one of the configured precentiles like 99, but not a custom one like 98. I also configured a threshold on my business transaction, so the Violations per Business Transaction % value on the BT hotspot dashlet shows me the value for a point in time, but I have not found a way to chart that over time.
Thanks

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